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Xu X, Liu Y, Gong Q, Ma L, Wei W, Zhao L, Luo Z. PARP1 promotes EGFR-TKI drug-resistance via PI3K/AKT pathway in non-small-cell lung cancer. Cancer Chemother Pharmacol 2024:10.1007/s00280-024-04668-2. [PMID: 38609654 DOI: 10.1007/s00280-024-04668-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 04/02/2024] [Indexed: 04/14/2024]
Abstract
PURPOSE Tyrosine kinase inhibitor (TKI) resistance is the main type of drug resistance in lung cancer patients with epidermal growth factor receptor (EGFR) mutations, but its underlying mechanism remains unclear. The purpose of this work was to investigate the mechanism by which PARP1 regulates EGFR-TKI resistance to identify potential targets for combating drug resistance. METHODS The GEO databases, TCGA databases, western blot and qPCR studies were used to investigate the expression of PARP1 in lung cancer cells and tissues and its correlation with the prognosis of lung cancer. The expression of PARP1 in lung cancer TKI resistant cell PC9-ER and TKI sensitive cell PC9 was analyzed by qPCR and western blot. After knocking down of PARP1, CCK-8 assays, colony formation, flow cytometry were used to investigate its impact on erlotinib sensitivity, cell survival, cell cycle, and apoptosis. RNA-seq was used to investigate the mechanism by which PARP1 participates in EGFR-TKI resistance, and the results were validated in vitro and in vivo studies. RESULTS PARP1 was highly expressed in both lung cancer tissues and cells. Subsequently, increased PARP1 expression was observed in PC9-ER compared with its parental cell line. Knockdown of PARP1 increased erlotinib sensitivity, promoted cell apoptosis, and suppressed cell growth. RNA-seq and previous studies have shown that the PI3K/AKT/mTOR/P70S6K pathway is involved in PARP1-mediated TKI resistance, and these results were confirmed by Western blot in vitro and in vivo. CONCLUSION PARP1 may serve as a potential therapeutic target for reversing EGFR-TKI resistance in NSCLC via the PI3K/AKT/mTOR/P70S6K pathway.
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Affiliation(s)
- Xianping Xu
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, No. 25 Taiping Street, Jiangyang District Luzhou, Sichuan, 646000, China
- Department of Oncology, Chongqing Genaral Hospital, No.118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, China
| | - Yu Liu
- Department of Oncology, Chongqing Genaral Hospital, No.118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, China
| | - Qiang Gong
- Department of Hematology, Southwest Hospital, Third Military Medical University (Army Medical University), Gaotanyan Road Street, Shapingba District, Chongqing, 400038, China
| | - Le Ma
- Department of Hematology, Southwest Hospital, Third Military Medical University (Army Medical University), Gaotanyan Road Street, Shapingba District, Chongqing, 400038, China
| | - Wei Wei
- Department of Oncology, Chongqing Genaral Hospital, No.118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, China
| | - Linqiong Zhao
- Department of Oncology, Chongqing Genaral Hospital, No.118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, China
| | - Zhibin Luo
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, No. 25 Taiping Street, Jiangyang District Luzhou, Sichuan, 646000, China.
- Department of Oncology, Chongqing Genaral Hospital, No.118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, China.
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Wang J, Wang T, Feng YK, Liu Y, Fu B, Liu XT, Wu QZ. Deubiquitinating enzyme PSMD7 promotes bladder cancer development: Involvement of RAB1A stabilization. Cell Signal 2024; 114:110996. [PMID: 38040402 DOI: 10.1016/j.cellsig.2023.110996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/16/2023] [Accepted: 11/27/2023] [Indexed: 12/03/2023]
Abstract
BACKGROUND Proteasome 26S subunit, non-ATPase 7 (PSMD7) is a deubiquitinating enzyme that is involved in the stability of ubiquitinated proteins and participates in the development of multiple types of cancer. The roles of PSMD7 and its potential mechanisms in bladder cancer (BC) remain elusive. METHODS In this study, we identified that PSMD7 was overexpressed in BC tissues based on gene expression omnibus (GEO) database and TNMplot web. To investigate the functional role of PSMD7, two BC cell lines, T24 and 5637, were selected. The cells were transfected with vectors containing short hairpin RNAs against PSMD7 or plasmids containing full-length PSMD7 to knockdown or overexpress PSMD7. RESULTS Our results revealed that silencing PSMD7 inhibited cell proliferation, cycle progression, migration, invasion, and promoted cell apoptosis, whereas PSMD7 overexpression led to the opposite effects in the BC cells. Mechanically, PSMD7 influenced the protein expression but not the mRNA expression of the Ras-related protein Rab-1 A (RAB1A). PSMD7 combined with RAB1A and negatively regulated its ubiquitination, indicating that PSMD7 enhanced the stability of RAB1A through post-transcriptional modification. Moreover, the rescue experiment demonstrated that RAB1A was an important downstream effector molecule of PSMD7. Besides, the negative regulation of silencing PSMD7 on tumor growth was confirmed in mice. CONCLUSIONS Our study substantiated a novel mechanism by which PSMD7 stabilized RAB1A to accelerate the progression of BC.
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Affiliation(s)
- Jun Wang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China.
| | - Tao Wang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yuan-Kang Feng
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yu Liu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Bo Fu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Xiao-Tong Liu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Qi-Zhe Wu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
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Twumasi G, Wang H, Xi Y, Qi J, Li L, Bai L, Liu H. Genome-Wide Association Studies Reveal Candidate Genes Associated with Pigmentation Patterns of Single Feathers of Tianfu Nonghua Ducks. Animals (Basel) 2023; 14:85. [PMID: 38200816 PMCID: PMC10778472 DOI: 10.3390/ani14010085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/08/2023] [Accepted: 12/09/2023] [Indexed: 01/12/2024] Open
Abstract
In modern advanced genetics and breeding programs, the study of genes related to pigmentation in ducks is gaining much attention and popularity. Genes and DNA mutation cause variations in the plumage color traits of ducks. Therefore, discovering related genes responsible for different color traits and pigment patterns on each side of the single feathers in Chinese ducks is important for genetic studies. In this study, we collected feather images from 340 ducks and transported them into Image Pro Plus (IPP) 6.0 software to quantify the melanin content in the feathers. Thereafter, a genome-wide association study was conducted to reveal the genes responsible for variations in the feather color trait. The results from this study revealed that the pigmented region was larger in the male ducks as compared to the female ducks. In addition, the pigmented region was larger on the right side of the feather vane than on the left side in both dorsal and ventral feathers, and a positive correlation was observed among the feather color traits. Further, among the annotated genes, WNT3A, DOCK1, RAB1A, and ALDH1A3 were identified to play important roles in the variation in pigmented regions of the various feathers. This study also revealed that five candidate genes, including DPP8, HACD3, INTS14, SLC24A1, and DENND4A, were associated with the color pigment on the dorsal feathers of the ducks. Genes such as PRKG1, SETD6, RALYL, and ZNF704 reportedly play important roles in ventral feather color traits. This study revealed that genes such as WNT3A, DOCK1, RAB1A, and ALDH1A3 were associated with different pigmentation patterns, thereby providing new insights into the genetic mechanisms of single-feather pigmentation patterns in ducks.
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Affiliation(s)
- Grace Twumasi
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.T.); (H.W.); (Y.X.); (J.Q.); (L.L.); (L.B.)
- Farm Animal Genetic Resources Exploration and Innovation, Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Huazhen Wang
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.T.); (H.W.); (Y.X.); (J.Q.); (L.L.); (L.B.)
- Farm Animal Genetic Resources Exploration and Innovation, Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Yang Xi
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.T.); (H.W.); (Y.X.); (J.Q.); (L.L.); (L.B.)
- Farm Animal Genetic Resources Exploration and Innovation, Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Jingjing Qi
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.T.); (H.W.); (Y.X.); (J.Q.); (L.L.); (L.B.)
- Farm Animal Genetic Resources Exploration and Innovation, Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Liang Li
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.T.); (H.W.); (Y.X.); (J.Q.); (L.L.); (L.B.)
- Farm Animal Genetic Resources Exploration and Innovation, Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Lili Bai
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.T.); (H.W.); (Y.X.); (J.Q.); (L.L.); (L.B.)
- Farm Animal Genetic Resources Exploration and Innovation, Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Hehe Liu
- State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.T.); (H.W.); (Y.X.); (J.Q.); (L.L.); (L.B.)
- Farm Animal Genetic Resources Exploration and Innovation, Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
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Li W, Xu X, Ma Z, Shen P, Cheng B, Xia J, Li Y. LncRNA BANCR promotes oral squamous cell carcinoma progression via regulating Rab1A signaling. J Oral Pathol Med 2023; 52:727-737. [PMID: 37433101 DOI: 10.1111/jop.13463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/20/2023] [Accepted: 05/12/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND Long non-coding RNA BRAF-activated non-protein coding RNA plays bidirectional roles in human cancers. However, function and molecular mechanism of BRAF-activated non-protein coding RNA in oral squamous cell carcinoma still need to clarify further. METHODS Long non-coding RNA microarray assay, in situ hybridization staining, clinicopathological data analysis were performed to investigate expression pattern of BRAF-activated non-protein coding RNA in oral squamous cell carcinoma tissue samples. Constructing ectopically expressed BRAF-activated non-protein coding RNA in oral squamous cell carcinoma cells via plasmids or siRNAs, then changeable abilities of proliferation and motility of these cells were observed in vitro and in vivo. RNA-protein pulldown, RNA immunoprecipitation, and bioinformatics analyses were performed to explore potential pathways involved in BRAF-activated non-protein coding RNA-based regulation of malignant progression in oral squamous cell carcinoma. RESULTS BRAF-activated non-protein coding RNA was identified upregulated in oral squamous cell carcinoma tissue and correlated with nodal metastasis and clinical severity of patients. Overexpressed BRAF-activated non-protein coding RNA increased percentage of 5-ethynyl-2'-deoxyuridine-positive cells, viability, migration, and invasion rates of oral squamous cell carcinoma cells, while silenced BRAF-activated non-protein coding RNA could observe weakened effects in vitro. Xenograft tumor formed by BRAF-activated non-protein coding RNA-overexpressed cells had bigger volume, faster growth rates, higher weight, and more Ki67+ cells. Pulmonary metastasis induced by BRAF-activated non-protein coding RNA-silenced cells had fewer colony nodes, Ki67+ cells, and CD31+ blood vessels. Furthermore, BRAF-activated non-protein coding RNA was mainly localized in nucleus of oral squamous cell carcinoma cells and bound Ras-associated binding 1A. Silencing Ras-associated binding 1A could damage mobile ability and phosphorylation levels of nuclear factor-κB in oral squamous cell carcinoma cells induced by overexpressing BRAF-activated non-protein coding RNA. Opposite trend was also observed. CONCLUSION Acting as a promoter in oral squamous cell carcinoma metastasis, BRAF-activated non-protein coding RNA promotes oral squamous cell carcinoma cells proliferation and motility by regulating the BRAF-activated non-protein coding RNA/Ras-associated binding 1A complex, which activates nuclear factor-κB signaling pathway.
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Affiliation(s)
- Weiyu Li
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Xiaoqing Xu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Zeyi Ma
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Peiqi Shen
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Bin Cheng
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Juan Xia
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Yaoyin Li
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
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Zhang Y, Di Q, Chen J, Chang M, Ma Y, Yu J. Circ_0061140 Contributes to the Malignant Progression in Ovarian Cancer Cells by Mediating the RAB1A Level Through Sponging miR-361-5p. Biochem Genet 2022; 60:1946-1962. [PMID: 35181843 DOI: 10.1007/s10528-022-10200-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 02/02/2022] [Indexed: 11/02/2022]
Abstract
Ovarian cancer (OC) progression is related to many functional molecules, including circular RNAs (circRNAs). Hsa_circ_0061140 (circ_0061140) promoted cell growth and metastasis in OC. The aim of this study was to explore a specific functional mechanism of circ_0061140. Reverse transcription-quantitative polymerase chain reaction was performed for expression analysis of circ_0061140, microRNA-361-5p (miR-361-5p), and Ras-like protein in rat brain 1A (RAB1A). Cell proliferation was determined using Cell Counting Kit-8 assay, EdU assay, and colony formation assay. The migration and invasion were assessed through transwell assay. Tube formation assay was used for angiogenesis analysis. Cell apoptosis was evaluated using flow cytometry. The protein levels of epithelial-to-mesenchymal transition (EMT) markers and RAB1A were detected via western blot. Target analysis was performed by dual-luciferase reporter assay and RNA immunoprecipitation assay. In vivo research was conducted using xenograft model. The circ_0061140 level was upregulated in OC samples and cells. Downregulation of circ_0061140 impeded proliferation, migration, invasion, EMT, and angiogenesis of OC cells. Circ_0061140 directly interacted with miR-361-5p to act as a miRNA sponge. The miR-361-5p inhibition reversed the si-circ_0061140-induced anti-tumor function in OC cells. RAB1A was a downstream target of miR-361-5p, and miR-361-5p served as a tumor repressor in OC via inhibiting the level of RAB1A. Circ_0061140 could increase the RAB1A expression by sponging miR-361-5p in OC cells. Circ_0061140 also facilitated tumorigenesis in vivo through targeting the miR-361-5p/RAB1A axis. All results demonstrated that circ_0061140 promoted OC development by inhibiting miR-361-5p to upregulate the expression of RAB1A.
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Affiliation(s)
- Yi Zhang
- Department of Gynecology, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
| | - Quanshu Di
- Department of Oncology, Remin Hospital, Hubei University of Medicine, Shiyan People's Hospital, 39 Chaoyang Road, Maojian District, Shiyan City, 442000, Hubei Province, China
| | - Jiao Chen
- Department of Cardiology, Remin Hospital, Hubei University of Medicine, Hubei, 442000, China
| | - Muyu Chang
- Department of Gynecology, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
| | - Yalin Ma
- Department of Gynecology, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
| | - Jianyun Yu
- Department of Oncology, Remin Hospital, Hubei University of Medicine, Shiyan People's Hospital, 39 Chaoyang Road, Maojian District, Shiyan City, 442000, Hubei Province, China.
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Cheng B, Hong X, Wang L, Cao Y, Qin D, Zhou H, Gao D. Curzerene suppresses progression of human glioblastoma through inhibition of glutathione S-transferase A4. CNS Neurosci Ther 2022; 28:690-702. [PMID: 35048517 PMCID: PMC8981481 DOI: 10.1111/cns.13800] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/26/2021] [Accepted: 01/01/2022] [Indexed: 12/18/2022] Open
Abstract
Aims Glioblastoma is the central nervous system tumor with the highest mortality rate, and the clinical effectiveness of chemotherapy is low. Curzerene can inhibit the progression of non‐small‐cell lung cancer, but its role in glioma has not been reported. The purpose of this study was to clarify the effect of curzerene on glioma progression and further explore its potential mechanism. Methods The expression of glutathione S‐transferase A4 (GSTA4) in glioblastoma and the effect of curzerene on the expression of GSTA4 and matrix metalloproteinase 9 and the activation of the mTOR pathway were detected by Western blotting and RT‐PCR, and the effects of curzerene treatment on glioma malignant character were detected by cell biological assays. The in vivo antitumor effects of curzerene were analyzed in a nude mouse xenograft model. Results Curzerene was found to inhibit the expression of GSTA4 mRNA and protein in U251 and U87 glioma cells, and this effect correlated with a downregulation of the proliferation of these cells in a time‐ and dose‐dependent manner. Invasion and migration were also inhibited, and curzerene treatment correlated with induction of apoptosis. Curzerene inhibited the activation of the mTOR pathway and the expression of matrix metalloproteinase 9, and it correlated with increased 4‐hydroxynonenal levels. In vivo, curzerene was found to significantly inhibit tumor growth in nude mice and to prolong the survival time of tumor‐bearing nude mice. Conclusion In conclusion, inhibition of GSTA4 correlates with positive outcomes in glioma models, and thus, this molecule is a candidate drug for the treatment of glioma.
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Affiliation(s)
- Bo Cheng
- Department of Neurobiology and Cell Biology, Xuzhou Medical University, Xuzhou, China.,Department of Psychiatry, The affiliated Xuzhou Oriental Hospital of Xuzhou Medical University, Xuzhou, China
| | - Xiaoliang Hong
- Department of Psychiatry, The affiliated Xuzhou Oriental Hospital of Xuzhou Medical University, Xuzhou, China
| | - Linfang Wang
- Department of Gynaecology, Xuzhou Maternity and Child Health Care Hospital 3, Xuzhou, China
| | - Yuanyuan Cao
- Department of Psychiatry, The affiliated Xuzhou Oriental Hospital of Xuzhou Medical University, Xuzhou, China
| | - Dengli Qin
- Department of Psychiatry, The affiliated Xuzhou Oriental Hospital of Xuzhou Medical University, Xuzhou, China
| | - Han Zhou
- Department of Psychiatry, The affiliated Xuzhou Oriental Hospital of Xuzhou Medical University, Xuzhou, China
| | - Dianshuai Gao
- Department of Psychiatry, The affiliated Xuzhou Oriental Hospital of Xuzhou Medical University, Xuzhou, China
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Fibroma of tendon sheath is defined by a USP6 gene fusion-morphologic and molecular reappraisal of the entity. Mod Pathol 2021; 34:1876-1888. [PMID: 34088995 DOI: 10.1038/s41379-021-00836-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 05/06/2021] [Accepted: 05/06/2021] [Indexed: 11/08/2022]
Abstract
Fibroma of tendon sheath (FTS) is an uncommon benign myofibroblastic neoplasm that arises in association with tenosynovial tissue. Fusions of the USP6 gene have been recently documented in a proportion of so-called "cellular FTS" but not in "classic FTS". It remains unknown whether FTS can be defined by a USP6 fusion, regardless of cellularity, and what are USP6 fusion-negative "cellular FTS". Furthermore, FTS with low cellularity seems to be frequently confused with desmoplastic fibroblastoma. We performed a comprehensive analysis, including targeted RNA sequencing, of 58 consecutive cases originally diagnosed as FTS (n = 49), desmoplastic fibroblastoma (n = 6), or nodular fasciitis (n = 3); the latter two at the predilection sites for FTS. After review of the original slides, 28 lesions were morphologically classified as FTS (13 "classic" and 15 "cellular") and 23 as desmoplastic fibroblastoma. Among originally diagnosed FTS at the more cellular end of the spectrum, we identified seven lesions that shared many morphologic features of FTS but, in addition, showed several distinct morphologic features consistent with myofibroma, such as myoid appearance, branching thin-walled vessels, and perivascular growth. Targeted RNA sequencing showed a USP6 fusion in 17 of 18 analyzed FTS, regardless of cellularity, 0 of 5 desmoplastic fibroblastomas and 0 of 4 myofibromas. MYH9, COL1A1, and ASPN were identified as fusion partners in three cases each, and MIR22HG, CTNNB1, SPARC, CAP1, EMP1, LINC00152, NR1D1, and RAB1A in a single case each. FTS, regardless of cellularity, can be defined by a USP6 fusion with a variety of fusion partners. More cellular lesions exhibiting some morphologic features of FTS but lacking a USP6 fusion tend to be myofibromas.
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Rab1A promotes cell proliferation and migration by upregulating Gli1 in colorectal cancer. Sci Rep 2021; 11:16243. [PMID: 34376787 PMCID: PMC8355269 DOI: 10.1038/s41598-021-95798-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 07/31/2021] [Indexed: 11/16/2022] Open
Abstract
Rab1A, as a highly conserved small guanosine triphosphatase (GTPase), plays contentious roles in different types of cancers. The role of Rab1A in colorectal cancer (CRC) has been described in previous studies, but the molecular mechanisms of Rab1A in CRC remain far from being addressed. In the present study, we found that Rab1A expression was significantly upregulated in CRC tissues and increased Rab1A expression correlated with tumor size, lymph node metastasis (LNM) and tumor-node-metastasis (TNM) stage of CRC patients. We also found that Rab1A exerts its promotive effect on CRC cell proliferation, migration and EMT progress. Further mechanistic experiments showed that glioma-associated oncogene-1 (Gli1), as a key transcriptional factor of the Hedgehog pathway, was implicated in Rab1A-mediated regulation of CRC cell proliferation and migration. In addition, Rab1A upregulated Gli1 expression through Smoothened homolog (SMO)-independent pathway. Finally, Rab1A activated mechanistic target of rapamycin (mTOR) signaling in CRC cells. Collectively, our results define Rab1A as a novel regulator of Gli1 to promote CRC cell proliferation and migration, and suggest that the Rab1A/mTOR/Gli1 axis may serve as a promising therapeutic target for the treatment of CRC.
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Jin H, Tang Y, Yang L, Peng X, Li B, Fan Q, Wei S, Yang S, Li X, Wu B, Huang M, Tang S, Liu J, Li H. Rab GTPases: Central Coordinators of Membrane Trafficking in Cancer. Front Cell Dev Biol 2021; 9:648384. [PMID: 34141705 PMCID: PMC8204108 DOI: 10.3389/fcell.2021.648384] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 05/10/2021] [Indexed: 12/11/2022] Open
Abstract
Tumor progression involves invasion, migration, metabolism, autophagy, exosome secretion, and drug resistance. Cargos transported by membrane vesicle trafficking underlie all of these processes. Rab GTPases, which, through coordinated and dynamic intracellular membrane trafficking alongside cytoskeletal pathways, determine the maintenance of homeostasis and a series of cellular functions. The mechanism of vesicle movement regulated by Rab GTPases plays essential roles in cancers. Therefore, targeting Rab GTPases to adjust membrane trafficking has the potential to become a novel way to adjust cancer treatment. In this review, we describe the characteristics of Rab GTPases; in particular, we discuss the role of their activation in the regulation of membrane transport and provide examples of Rab GTPases regulating membrane transport in tumor progression. Finally, we discuss the clinical implications and the potential as a cancer therapeutic target of Rab GTPases.
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Affiliation(s)
- Hongyuan Jin
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Yuanxin Tang
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Liang Yang
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Xueqiang Peng
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Bowen Li
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Qin Fan
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Shibo Wei
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Shuo Yang
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Xinyu Li
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Bo Wu
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Mingyao Huang
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Shilei Tang
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Jingang Liu
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Hangyu Li
- Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
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Hwang YJ, Park JH, Cho DH. Activation of AMPK by Telmisartan Decreases Basal and PDGF-stimulated VSMC Proliferation via Inhibiting the mTOR/p70S6K Signaling Axis. J Korean Med Sci 2020; 35:e289. [PMID: 32893519 PMCID: PMC7476795 DOI: 10.3346/jkms.2020.35.e289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 07/16/2020] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Telmisartan, an angiotensin II type 1 receptor blocker (ARB), is widely used to treat hypertension by blocking the renin-angiotensin-aldosterone system. Although abnormal proliferation of vascular smooth muscle cells (VSMCs) is a well-established contributor to the development of various vascular diseases, such as atherosclerosis, the effect of telmisartan on VSMC proliferation and its mechanism of action have not been fully revealed. Herein, we investigated the molecular mechanism whereby telmisartan inhibits rat VSMC proliferation. METHODS We measured VSMC proliferation by MTT assay, and performed inhibitor studies and western blot analyses using basal and platelet-derived growth factor (PDGF)-stimulated rat VSMCs. To elucidate the role of AMP-activated protein kinase (AMPK), we introduced dominant-negative (dn)-AMPKα1 gene into VSMCs. RESULTS Telmisartan decreased VSMC proliferation, which was accompanied by decreased phosphorylations of mammalian target of rapamycin (mTOR) at Ser2448 (p-mTOR-Ser2448) and p70 S6 kinase (p70S6K) at Thr389 (p-p70S6K-Thr389) in dose- and time-dependent manners. Telmisartan dose- and time-dependently increased phosphorylation of AMPK at Thr172 (p-AMPK-Thr172). Co-treatment with compound C, a specific AMPK inhibitor, or ectopic expression of the dn-AMPKα1 gene, significantly reversed telmisartan-inhibited VSMC proliferation, p-mTOR-Ser2448 and p-p70S6K-Thr389 levels. Among the ARBs tested (including losartan and fimasartan), only telmisartan increased p-AMPK-Thr172 and decreased p-mTOR-Ser2448, p-p70S6K-Thr389, and VSMC proliferation. Furthermore, GW9662, a specific and irreversible peroxisome proliferator-activated receptor γ (PPARγ) antagonist, did not affect any of the telmisartan-induced changes. Finally, telmisartan also exhibited inhibitory effects on VSMC proliferation by increasing p-AMPK-Thr172 and decreasing p-mTOR-Ser2448 and p-p70S6K-Thr389 in a PDGF-induced in vitro atherosclerosis model. CONCLUSION These results demonstrated that telmisartan-activated AMPK inhibited basal and PDGF-stimulated VSMC proliferation, at least in part, by downregulating the mTOR/p70S6K signaling axis in a PPARγ-independent manner. These observations suggest that telmisartan could be used to treat arterial narrowing diseases such as atherosclerosis and restenosis.
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Affiliation(s)
- Yun Jin Hwang
- Department of Pharmacology, Yeungnam University College of Medicine, Daegu, Korea
| | - Jung Hyun Park
- Department of Molecular Medicine, Ewha Womans University College of Medicine, Seoul, Korea
| | - Du Hyong Cho
- Department of Pharmacology, Yeungnam University College of Medicine, Daegu, Korea.
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